Answer
t≤66
Work Step by Step
You can send up to 66 text messages.
Work Step by Step
Let t be the number of text messages you can send. The cost of the text messages is 0.15 dollars each, or 0.15t. If you can spend no more than 10 dollars, the cost of the text messages must be less than or equal to $10.
0.15t≤10⟶ divide each side by 0.15
0.15t÷0.15≤10÷0.15
t≤66.6
Since it is not possible to send a fraction of a text message and rounding up would make the cost exceed
=10 dollars, t≤66.
